Pump.



W. T. MGLEAN, H. G. LYONS & G. R. CLARK.

PUMP.

APPLICATION FILED NOV. 16, 1908.

Patented N0v.23, 1909.

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W. T. McLEAN, C. LYONS & 0., R. CLARK.

PUMP.

APPLICATION FILED NOV. 16. 1908.

Patented Nov. 23, 1909.

2 SHEETSSHEET 2,

vweidozs wmmm UNITED STATES PATENT omuon.

WILLIAM '1. MCLEAN, HENRY C. LYONS, AND CHARLES R. CLARK, OFALEXAIiTDB-IA, I

VIRGINI A.

PUMP.

Specification of Letters Patent.

Patented Nov. 23, 1909.

Application filed November 16, 1908. Serial No. 462964.

To all whom it may concern:

Be it known that we, WILLIAM T. Mo- LEAN, HENRY C. Lyons, and CHARLES R.CLARK, citizens of the United States, residing at Alexandria, in thecounty of Alexandria and State of Virginia, have invented certain 116Wand useful Improvements in Pumps; and we do declare the following 'to bea full, clear, and exact description of the invention, such as willenable others skilled in.the art to which it appertains'to make and usethe 'same,-'reference being had to the accompanying drawings, and to thefigures of reference marked thereon, which form a part of thisspecification.

' Our invention relates to the class of pumps, but more particularly toan air pump so constructed and arranged that the air or gas is forcedfrom one piston to another forming a high pressure pump of two or morestages. a

Our invention consists in the 'novel construction of the pump andarticularly in the construction which provi es forforcing the air or gasfrom one piston to another.

Our invention also consists in the novel construction for preventing thepistons from pounding against the divi ing wall.

Our invention further consists in certain other novel details ofconstruction and in combinations of parts, all of which will be firstfully described and afterward specifically pointed out in the appendedclaim.

Referring to the accompanying drawings: Figure 1 1s a verticaltransverse sectlon through the pump. Fig. 2 is a vertical longitudmalsection through the pump. Fig. 3'is a fragmentary view of front wall ofcasing, showing location of parts therein. Fig. 4 is an elevation ofpump'with rear plate orcover removed. Fig. 5 is a hori-.

zontal section taken on line 5-5 of Fig. 2. Like numerals of referenceindicate the same parts throughout the several figures in which: f

.1 indicates the pump which comprises the stationary pistons 2, whichare arranged on the front wall or casing 3 of the pump.

4 indicates the eccentric pistons which are arranged on a wall or plate5Fig. 2.

6 indicates the rear wall or p ate ofthe pump, and 7 the shell to whichthe front and rear walls or plates 3 and 6 are secured, preferably bymeans of screws or bolts 8 as shown in Fig. 2. It will be seen from thiswith two figure that the shaft 9 has an eccentric -enlargement 10therein while a rotatable bushing 11 is arranged on the eccentricenlargement 10. The rotatable eccentric bushing 11 is provided with arear wall 12 and a central opening to receive a screw or bolt 13 whichis threaded into the eccentric enlargement 10 of the shaft 9. It willalso be seen from Fig. 2 that the eccentric pistons 4 are mounted on theeccentric bushing 12, and that the wall or plate 5 of said pistons isthreaded to receive a cap 14.

Referring .to the rear wall or plate 6 of the pump it will be seen thatthe same is threaded to receive a cap 15, said cap being of such a sizeas" to permit removal of the cap 14 in order to rotate the eccentricbushing 11 on the eccentric enlargement 10 of the shaft 9- in order toadjust theeccentric pistons" The shell 7 is cored at 16 communicatingorts 17 and 18 at the bottom of the shell, this coring forming a water'jacket for the pump for the purpose of cooling the same. A ort 19 isalso provided at the top of the she as shown in Fig. 1.

It will be seen from Fig. 1 that a cored passage 20, shown in dottedlines, connects the port 21 on one sidefof the dividing wall orpartition 22 with a similar port 23 on the opposite side of the dividingwall or part1- tion 22, said port 23 bein'g in a higher stage than theport 21; while similar ports 24 and 25 are also provided, said port 24being an intake portend the port 25 the discharge port.

Referring to Figs. 4 and 5, it will be seen that a link 26 pivoted tothe shell 7 at 27 and to the plate 5 at 28 is employed to prevent theplstons 4from pounding a must the portion 22, said link allowing thepistons to operate freely.

In operation, the port 24 is the intake port, said port 24 being asshown in Fig. 1

' 1n the lowest stage. The air or-gas entering the port 24 is forcedaround the piston to the opposite side of the dividing wall or part1-tion 22 escapin through the port 21 and passing alon the cored passage20 to the port 23, in t e next stage where the air or gas isforcedaround the piston to the opposite side of the dividing wall or partition22 and into the, port 25 and discharged from the pump the air or gasbeing subjected to a higher pressure in each succeeding stage.

Jacket pumps As it. is the practice usually to suitably of this type thesame may be effected by means of the coring 16 in the shell of the pump,although of course it is obvious that the extent of the jacket dependsupon the capacity of the pump and the number of stages which determinesthe extent of compression of air or gas Within the pump.

The greater the compression and the greater the number of stages themore eflicient must be the water jacket.

Having thus fully described our invention what we claim as newand desireto secure by Letters Patent of the United States is,-

A pump of the character described com prising a suitable shell orcasing, stationary pistons and movable pistons therein, an ec centricfor operating said movable pistons, a dividing wall or partition forsaid pistons, a port or passage leading from one statione ary and onemovable piston on one side of said dividing wall or partition to anotherstationary iston and movable piston on the opposite si e of saidstationary wall or par: t1 1011.

In testimony whereof, we aliix our tures, mpresence of two witnesses.

T.-McLEAN. HENRY C. LYONS. CHARLES R. CLARK.

signa- Witnesses:

PAUL F. GROVE, H. NOEL GARNER.

